The major sections of a CPU || Definition || solo gyan

The major sections of a CPU are. 

• Primary Memory 
• ALU
• Control Unit 

Primary Memory 

Primary memory or the main memory unit is one of the major parts of a computer. It holds data which is currently manipulated by the CPU. It also keeps the necessary operating system, such as Microsoft Disk Operating system ( MS-DOS ) or windows. Since Primary memory is present within the CPU itself, it is also known as internal memory or RAM.

Arithmetic Logic Unit ( ALU )

ALU of a computer system is the place where the actual execution of instructions takes place. To be more precise, all calculations are performed and all comparisons ( decisions ) are made in the ALU. 

All ALUs are designed to perform the four basic arithmetic operations - add, subtract, multiply, divide - and logic operations, such as less than, equal to or greater than. 

Control Unit ( CU )

This unit is responsible for controlling the entire working of the computer. The timing and control signals are generated by this unit and sent to other units for execution of the program for proper control. It also controls the transfer of the between memory and input / output devices.